JPH0365548B2 - - Google Patents
Info
- Publication number
- JPH0365548B2 JPH0365548B2 JP59085843A JP8584384A JPH0365548B2 JP H0365548 B2 JPH0365548 B2 JP H0365548B2 JP 59085843 A JP59085843 A JP 59085843A JP 8584384 A JP8584384 A JP 8584384A JP H0365548 B2 JPH0365548 B2 JP H0365548B2
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- layer
- color
- area
- black
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 18
- 108091008695 photoreceptors Proteins 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000004042 decolorization Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000003086 colorant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/12—Recording members for multicolour processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、電子写真複写機或いは電子写真技術
を用いたプリンタ等の画像形成装置に関するもの
で、特に２色画像形成装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus such as an electrophotographic copying machine or a printer using electrophotographic technology, and particularly relates to a two-color image forming apparatus.
電子写真複写機は、今日、２色或いは、多色画
像による複写の需要が増大している。
Nowadays, demand for electrophotographic copying machines for copying two-color or multicolor images is increasing.
２色画像複写方法の従来のものは、一般に多色
カラー複写と同様に色数に応じたプロセスを繰り
返し行つていた。 Conventional two-color image copying methods generally repeat processes according to the number of colors, similar to multicolor copying.
しかし、色数に応じたプロセスを繰り返すこと
は、色ずれや、各色トナーの混色を招き易く明瞭
な２色画像を得ることは難しかつた。 However, repeating the process according to the number of colors tends to cause color misregistration and color mixing of toners of each color, making it difficult to obtain a clear two-color image.
そこで、これを解決するものとして、１回の静
電潜像形成工程により、２色画像を形成する方法
が提案されていた。第１図はその一例を示す工程
図である。添付図面に従つて従来例を説明する
と、第１図の工程において導電性基体ａの上に
光導電層ｂ、絶縁層ｃの順に積層した感光体に一
様に一次帯電、例えば、負極性帯電を行う。この
時、同時にまたは、その直後に全面露光を行う。
すると、絶縁層ｃの表面に負電荷が沈積し、絶縁
層ｃと光導電層ｂの境界付近には逆極性の正電荷
が誘起される。の工程では、逆極正の二次帯電
を行いながら赤補色フイルターF1を介して白地
に赤色、黒色の２色画像を有する原稿ORの像を
露光する。すると、白地に対応するＷ部分にのみ
赤以外の光が入射するので、その部分の光導電層
ｂの抵抗が下がる一方、逆極性帯電を受けること
で、表面電位はほぼ零となる。赤色に対応するＲ
部分及び黒色に対応するＢ部分では、絶縁層ｃと
光導電層ｂの境界付近の誘起正電荷は保持された
ままであるが表面が正極性に帯電されるため絶縁
層ｃの表面の負電荷は減少する。 As a solution to this problem, a method has been proposed in which a two-color image is formed by a single electrostatic latent image forming process. FIG. 1 is a process diagram showing an example. A conventional example will be explained with reference to the accompanying drawings. In the process shown in FIG. I do. At this time, the entire surface is exposed simultaneously or immediately thereafter.
Then, negative charges are deposited on the surface of the insulating layer c, and positive charges of opposite polarity are induced near the boundary between the insulating layer c and the photoconductive layer b. In the step, an image of the original OR having a two-color image of red and black on a white background is exposed through a red complementary color filter F1 while performing secondary charging with opposite polarity. Then, since light other than red is incident only on the W portion corresponding to the white background, the resistance of the photoconductive layer b in that portion decreases, and the surface potential becomes almost zero due to being charged with the opposite polarity. R corresponding to red
In the part B corresponding to the black part and the black part, the induced positive charge near the boundary between the insulating layer c and the photoconductive layer b is retained, but the surface is charged to a positive polarity, so the negative charge on the surface of the insulating layer c is Decrease.
の工程では、原稿ORの光像を今度は赤色フ
イルターF2を介して与えると赤色光のみがＷ及
びＲ部分に入射する。すると、Ｒ部分では、光導
電層ｂの抵抗が下がり、絶縁層ｃと光導電層ｂの
境界付近の誘起正電荷のうち表面に対応したもの
以外は、アース側へ逃げ、表面電位は負となる。 In the process, when the optical image of the original OR is now provided through the red filter F2 , only the red light enters the W and R portions. Then, in the R part, the resistance of the photoconductive layer b decreases, and the induced positive charges near the boundary between the insulating layer c and the photoconductive layer b, other than those corresponding to the surface, escape to the ground side, and the surface potential becomes negative. Become.
この結果、白地に対応するＷ部分の表面電位
は、零、赤色に対応するＲ部分の表面電位は、
負、黒色に対応するＢ部分の表面電位は、正とい
う形の潜像を作る。該潜像のＲ部分に正極性の赤
トナーをＢ部分に負極性の黒トナーを与えれば、
２色画像を得ることができる。 As a result, the surface potential of the W part corresponding to the white background is zero, and the surface potential of the R part corresponding to the red background is
The surface potential of portion B, which corresponds to negative and black colors, creates a positive latent image. By applying positive polarity red toner to the R part of the latent image and negative polarity black toner to the B part,
A two-color image can be obtained.
従来の２色画像形成方法では、黒色部と赤色部
の電位差が大きくとれないという短所が存在し
た。また、電位的には正極性の黒色部の表面にも
負電荷が残つているため赤色トナーが付いてしま
い混色が生じていた。更に、帯電制御を非常に厳
格に行われなければならず、その為の制御が大変
であつた。
The conventional two-color image forming method has a disadvantage in that it is not possible to maintain a large potential difference between the black part and the red part. In addition, since negative charges remained on the surface of the black portion, which has a positive polarity in terms of potential, red toner was attached to the surface, resulting in color mixing. Furthermore, charging control had to be carried out very strictly, and the control for this purpose was difficult.
本発明は上記従来の欠点に鑑み、黒色部と有彩
色部の電位を完全な逆極性に分離できる感光体と
その感光体を使用した２色画像形成方法を提供す
ることを目的とする。
SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, it is an object of the present invention to provide a photoreceptor in which the potentials of a black area and a chromatic area can be separated into completely opposite polarities, and a two-color image forming method using the photoreceptor.
本発明は上記目的を達成するために、感光体の
構造を表面から順に絶縁層、光導電層、フオトク
ロミツク材料層の三層構造とした事を特徴とす
る。
In order to achieve the above object, the present invention is characterized in that the photoreceptor has a three-layer structure consisting of an insulating layer, a photoconductive layer, and a photochromic material layer in order from the surface.
以下、図面に従つて本発明の一実施例について
説明する。
An embodiment of the present invention will be described below with reference to the drawings.
第２図は、本発明の感光体１の構造を示す一部
切欠断面図である。感光体１は、表面に絶縁層
２、次に光導電層３、透明電極４、最下層に基体
５を有して構成されている。 FIG. 2 is a partially cutaway sectional view showing the structure of the photoreceptor 1 of the present invention. The photoreceptor 1 has an insulating layer 2 on the surface, a photoconductive layer 3, a transparent electrode 4, and a base 5 as the bottom layer.
基体５は、フオトクロミツク材料から成り、該
材料は、光メモリ機能、すなわち可逆的発消色性
を持つ高機能材料であり、研究の対象となつてい
る材料も有機化合物から、無機化合物、或いは異
種機能を持つ材料の組み合せによるデバイスに至
るまでその種類が多く、実用的にも将来的にも非
常に大きな可能性を持つた興味ある材料である。
そして、短波長光（λ1）を受けることにより緑、
グレー等に発色し、長波長光（λ2）を受けること
により消色する。更に、その消色作用は、加熱す
ることにより促進される。このような材料として
は、例えば、CaF2の母体結晶中に、Sn／Euを添
加したものや、SrTiO3の母体結晶中にNi／Mo
を添加したもの等が挙げられ、いずれも短波長光
により発色し、長波長光により消色する。 The substrate 5 is made of a photochromic material, which is a highly functional material that has a photomemory function, that is, reversible color development/decolorization.The materials that are the subject of research include organic compounds, inorganic compounds, and compounds with different functions. There are many types of devices, including devices made from combinations of materials with different properties, making it an interesting material with great practical and future potential.
Then, by receiving short wavelength light (λ 1 ), green,
It develops a color such as gray and disappears when exposed to long wavelength light (λ 2 ). Furthermore, the decoloring action is accelerated by heating. Such materials include, for example, CaF 2 matrix crystals containing Sn/Eu, and SrTiO 3 matrix crystals containing Ni/Mo.
All of them develop color when exposed to short wavelength light and disappear when exposed to long wavelength light.
次に、前記のフオトクロミツク材料から成る感
光体を用いた２色画像形成方法について、第３図
を用いて説明する。 Next, a two-color image forming method using a photoreceptor made of the photochromic material described above will be explained with reference to FIG.
第３図において、感光体１の表面をコロナ帯
電極８によつて負に一次帯電する。それと同時
に、原稿OR（白地部Ｗ上に青色部BLと黒色部
BKを有する。）像を青フイルターｂを介して露
光する。すると色地対応部と青色対応部では、光
導電層３の抵抗が下がり、絶縁層２と光導電層の
境界付近に逆極性の正電荷が誘起され、絶縁層の
上下に正負一対の電荷が形成される。黒色対応部
では、光照射を受けない為、光導電層３の抵抗は
高いままであり、背面誘起電荷は注入されず、そ
の分、白地対応部及び青色対応部に比べ表面電荷
は少なくなる。 In FIG. 3, the surface of the photoreceptor 1 is primarily negatively charged by a corona charge electrode 8. As shown in FIG. At the same time, the original OR (blue area BL and black area on white area W)
Has BK. ) Expose the image through a blue filter b. As a result, the resistance of the photoconductive layer 3 decreases in the colored background corresponding area and the blue corresponding area, and positive charges of opposite polarity are induced near the boundary between the insulating layer 2 and the photoconductive layer, and a pair of positive and negative charges is created above and below the insulating layer. It is formed. In the black corresponding area, since it is not irradiated with light, the resistance of the photoconductive layer 3 remains high, and no back surface induced charge is injected, so that the surface charge is reduced accordingly compared to the white background corresponding area and the blue corresponding area.
また、この時比較的強い露光を与えることによ
り光導電層４に吸収されなかつた光は、基体５に
到達し、フオトクロミツク材料である基体５は、
この光（λ1）に反応し発色する（第３図５の斜
線部）。 Also, at this time, the light that is not absorbed by the photoconductive layer 4 due to relatively strong exposure reaches the substrate 5, and the substrate 5, which is a photochromic material,
It reacts to this light (λ 1 ) and develops a color (the shaded area in FIG. 3, 5).
次に、此の感光体１に対して第３図に示すよ
うに一次帯電と逆極性の二次帯電をコロナ帯電極
９により行う。同時に、黄フイルターを介した原
稿ORの光像露光と、感光対１の裏側からの背面
露光を行う。この時の光源の波長は、フオトクロ
ミツク反応の起らな波長λ3（λ1＜λ3≪λ2）に設定
する。これにより、白地対応部は電荷が中和され
表面電荷は消滅し、青色対応部は光導電層３の抵
抗が高いままであり、第３図における絶縁層２
の背面誘起電荷を保持したまま、逆極性の二次帯
電が行われるため、表面の一次帯電電荷は減少す
るものの完全には中和はされずに負極性電荷が残
留する。黒色対応部は、フオトクロミツク反応を
起しておらず透明のままであるので背面露光によ
り光導電層３の抵抗が下がるため、背面電荷の注
入が行われ、一次帯電による表面電荷を中和し、
さらに逆極性の正極性側に帯電される（第３図
）。その後、λ2の長波長光により全面露光し、
さらに好ましくは、熱を与えることにより、フオ
トクロミツク材料である基体５は、消色し、ま
た、表面電荷に対応しない背面誘起電荷は、電荷
注入により中和される。尚、全面照射および加熱
は、表面側からでも裏面側からでも、どちら側か
らでも行つても良い（第３図）。この際、加熱
すると消色速度を増すことができる。 Next, the photoreceptor 1 is subjected to secondary charging with a polarity opposite to the primary charging using the corona charging electrode 9, as shown in FIG. At the same time, light image exposure of the original OR through a yellow filter and rear exposure from the back side of photosensitive pair 1 are performed. The wavelength of the light source at this time is set to a wavelength λ 3 (λ 1 <λ 3 <<λ 2 ) at which no photochromic reaction occurs. As a result, the electric charge is neutralized and the surface charge disappears in the white background corresponding area, and the resistance of the photoconductive layer 3 remains high in the blue background corresponding area, and the insulating layer 2 in FIG.
Secondary charging of opposite polarity is performed while retaining the back surface induced charge, so although the primary charge on the surface is reduced, it is not completely neutralized and negative charges remain. Since the black corresponding area does not undergo a photochromic reaction and remains transparent, the resistance of the photoconductive layer 3 decreases due to back exposure, and back charge is injected to neutralize the surface charge caused by primary charging.
Furthermore, it is charged to the positive polarity side of the opposite polarity (FIG. 3). After that, the entire surface is exposed to long wavelength light of λ 2 ,
More preferably, by applying heat, the substrate 5, which is a photochromic material, is decolored, and back-induced charges that do not correspond to surface charges are neutralized by charge injection. Incidentally, the entire surface irradiation and heating may be performed from either the front side or the back side (FIG. 3). At this time, heating can increase the decoloring speed.
この結果、感光体表面は白地対応部の表面電位
は零、青色対応部、黒色対応部は互いに逆極性の
表面電位を持つ２色潜像が得られる。 As a result, a two-color latent image is obtained on the surface of the photoreceptor, with the surface potential of the area corresponding to the white background being zero, and the surface potential of the area corresponding to blue and the area corresponding to black having opposite polarities.
以上の方法によると、青色対応部と黒色対応部
の電位が完全に逆極性となり電位差が大きくなる
ため、現像の際に、電位差が少ないために起きる
トナーの混色などはなくなり、鮮明な２色画像が
得られることになる。 According to the above method, the potentials of the blue corresponding area and the black corresponding area become completely opposite in polarity and the potential difference becomes large. Therefore, during development, color mixing of toner that occurs due to a small potential difference is eliminated, resulting in a clear two-color image. will be obtained.
以上のように構成された本発明の感光体及び感
光体を用いた２色画像形成プロセスによれば、黒
色部と有色部の電位を完全に逆極性とすることが
でき、電位差を大きく取れるため、混色のない鮮
明な２色画像を得る事ができる。
According to the photoconductor of the present invention configured as described above and the two-color image forming process using the photoconductor, the potentials of the black part and the colored part can be made completely opposite in polarity, and a large potential difference can be obtained. , it is possible to obtain a clear two-color image without color mixture.
また、帯電制御を厳格に行う必要もなく、大掛
りな装置を必要としない。 Furthermore, there is no need to strictly control charging, and no large-scale equipment is required.
第１図は従来の２色画像形成プロセスを示す工
程図、第２図は本発明の感光体を示す断面図、第
３図は本発明の２色画像形成プロセスを示す工程
図である。
１……感光体、２……絶縁層、３……光導電
層、４……透明電極、５……基体、６……青フイ
ルター、７……黄フイルター、８，９……コロナ
帯電極、OR……原稿、Ｗ……白地部、BL……青
色部、BK……黒色部。
FIG. 1 is a process diagram showing a conventional two-color image forming process, FIG. 2 is a sectional view showing a photoreceptor of the present invention, and FIG. 3 is a process diagram showing a two-color image forming process of the present invention. DESCRIPTION OF SYMBOLS 1... Photoreceptor, 2... Insulating layer, 3... Photoconductive layer, 4... Transparent electrode, 5... Substrate, 6... Blue filter, 7... Yellow filter, 8, 9... Corona charged electrode , OR...manuscript, W...white area, BL...blue area, BK...black area.
Claims (1)
ミツク材料層の三層構造を有する事を特徴とする
感光体。 ２ 表面から順に絶縁層、光導電層、フオトクロ
ミツク材料層の三層構造を有する感光体表面側か
ら所定極性の一次帯電を行うと同時に第１露光を
行い、続いて前記感光体表面側から一次帯電とは
逆極性の二次帯電を行うと同時に第２露光を行
い、かつ前記感光体のフオトクロミツク材料層を
発色も消色もさせない光にて全面照射を行い、然
る後消色工程を行うことを特徴とする２色画像形
成方法。[Scope of Claims] 1. A photoreceptor characterized by having a three-layer structure consisting of an insulating layer, a photoconductive layer, and a photochromic material layer in order from the surface. 2 Primary charging of a predetermined polarity is performed from the surface side of a photoreceptor having a three-layer structure consisting of an insulating layer, a photoconductive layer, and a photochromic material layer in order from the surface, and at the same time, first exposure is performed, and then primary charging is performed from the surface side of the photoreceptor. At the same time as secondary charging of opposite polarity is performed, second exposure is performed, and the entire surface of the photosensitive material layer is irradiated with light that does not cause color development or decolorization, and then a decolorization step is performed. A two-color image forming method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59085843A JPS60230144A (en) | 1984-04-27 | 1984-04-27 | Photosensitive body and formation of two-color image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59085843A JPS60230144A (en) | 1984-04-27 | 1984-04-27 | Photosensitive body and formation of two-color image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60230144A JPS60230144A (en) | 1985-11-15 |
| JPH0365548B2 true JPH0365548B2 (en) | 1991-10-14 |
Family
ID=13870143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59085843A Granted JPS60230144A (en) | 1984-04-27 | 1984-04-27 | Photosensitive body and formation of two-color image |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60230144A (en) |
-
1984
- 1984-04-27 JP JP59085843A patent/JPS60230144A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60230144A (en) | 1985-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |